Granted Patent
Utility
US 4,582,491 · App. 06/541,138
Training apparatus
Inventor:
Wilfred D. Monteith
Patented Case
View Patent ↗
Granted: Apr 15, 1986
Filed: Oct 3, 1983
Inventor
Wilfred D. Monteith
Assignee (at issue)
Marconi Instruments Limited
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.